BGS Radon Potential combines indoor Radon measurements for around half a million homes across Great Britain and around 25,000 homes in Northern Ireland provided by UK Health Security Agency (formerly Public Health England) with BGS 1:50 000 scale geology.  

Radon is a natural radioactive gas, which enters buildings from the ground and persists or accumulates where ventilation is poor.  It is the biggest source of human exposure to ionising radiation with prolonged exposure increasing the risk of lung cancer.  The data informs about ground conditions in properties relating to health protection.

Updated in December 2022, it classifies areas based on their likelihood of a property having a radon level at or above the ‘Action Level’ in Great Britain requiring corrective action (200 becquerel per cubic metre).  The dataset provides an assessment in six classes (1-6, low to high) of the likelihood of a dwelling having a radon concentration at or above the action Level rather than the actual radon level within a specific dwelling.  The action level indicates where it may be necessary to apply preventative measures in new buildings and extensions.

Useful for site development and construction activities.